The price elasticity of demand refers to the response of quantity demanded to a change in price. Which of the following is false?

A. Demand is said to be price inelastic when small quantity changes are observed for relatively large price changes

B. For normal goods, the price elasticity of demand is always negative due to the inverse relationship between price and quantity demanded

C. Demand is said to be elastic when quantities respond slowly to a change in price - the quantities are able to be stretched.

D. Price elasticity of demand is defined as the percent change in quantity for a given percent change in price